Social contribution through technical development of improvement on seismic performance of confined masonry wall structures being popular in developing countries

通过改善发展中国家流行的有限砌体墙结构抗震性能的技术开发来做出社会贡献

基本信息

批准号：
16360270
负责人：
JOH Osamu
金额：
$ 9.86万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2007
项目状态：
已结题

项目摘要

This study was carried out to investigate the seismic performances of confined masonry wall structures, which are very popular in developing countries, by ways of experiment, analysis, bibliography and field survey.In the experiment, all specimens formed with one-span and one-story were subjected to reversal lateral shear force and constant vertical load simulating stress diagram in the first story of three story building. The specimens with a 1/2.5 scale had a masonry wall consisted of clay bricks with two holes and surrounded by RC columns & beams. The variables were form/size/location of an opening in the wall, shear-span-ratio, depth of columns and three types of strengthening methods for the wall with an opening.The remarks of the test results were follows: 1) shear capacity of this structure effected mainly by sliding strength of mortar mesh joints between bricks and shear strength of columns, 2) walls with an opening failed in shear caused by sliding of sleeve wall (s) in the si … More de of the opening and the sliding strength related to vertical compressive stress in the sleeve-wall plane occurred by rotation of the wall structure, 3) three strengthening methods (inserting a frame made of timber lamination or steel pipes in the window opening, and jacketing with wire-mesh and mortar) showed good improvement on shear capacity and deformability, and 4) clay bricks with two lateral holes could simulate the mechanical behaviors which had difference in three axial directions.This confined masonry wall structure was analyzed by an inelastic finite element method which was developed for reinforced concrete structures. Sliding characteristics of mortar joint between bricks were obtained by shear loading tests for layered brick specimens and a shear-sliding relation curve was modeled from the characteristics. In comparison between load-drift relations obtained from the experiments and analyses, it was cleared that compressive stress on joint planes effected remarkably on the shear capacity and deformability of this structure. Less

进行了这项研究以研究狭窄的砖石壁结构的地震表演，在发展中国家，通过实验，分析，参考书目和现场调查非常受欢迎。具有1/2.5比例的标本的砌体墙由带有两个孔的粘土砖组成，并由RC柱和梁周围。 The variables were form/size/location of an opening in the wall, shear-span-ratio, depth of columns and three types of strengthening methods for the wall with an opening.The remarks of the test results were following: 1) shear capacity of this structure affected mainly by sliding strength of mortar mesh joints between bricks and shear strength of columns, 2) walls with an opening failed in shear caused by sliding of sleeve wall (s) in the si …通过旋转墙壁结构的旋转出现了与袖子壁平面中与垂直压缩应力相关的更多与垂直压力应力相关的滑动力轴向方向。通过一种无弹性有限元方法分析了该密封的砌体壁结构，该方法是为钢筋混凝土结构开发的。通过对分层砖标本的剪切载荷测试获得砖之间的砂浆关节的滑动特性，并根据特征对剪切滑动关系曲线进行建模。与从实验和分析中获得的负载拖船关系之间的相比，可以清楚地看出，对关节平面的压力应对该结构的剪切能力和可变形性产生显着影响。较少的